TV Tuner Card MD9717 on Windows Vista with Media Center?

Hello,
I have an old Medion TV/FM Radio Tuner Card MD9717 (analog TV) installed on my new PC running Windows Vista Premium. The Card used to run without problems under Windows XP. During installation a driver was found for SAA7134 Philips. The device manager shows the driver correctly installed.
When I configure MSN Live Messenger Video set-up I can choose between the TV Tuner card and the web cam connected. When selecting the TV card as input, I see the TV program in a small window in the setup window. So the card is recognized and seem sto work at least with MSN Messenger.
When I tried to configure the card with Media Center, I did not get anything - no TV Tuner card installed. However, I then installed the MainConcept MCE encoder and then I was able to configure Media Center - program information is found, the Radio Tuner can be configured, but when I try to scan for TV channels, the search always ends without any TV channel found.
I have analog cable in my house and as I said, it used to work with Windows XP without problems using the InterVideo TV application supplied with the card. This software does not work on Vista, though.
I tried out Media Portal as well, but the TV card was not recognized there at all.
I also searched the web already quite intensively, but I not find hint so far. Any help is appreciated. Ideally I'd like to get the card working with media center, but any other application which I could use on Vista to watch TV I would appreciated as well.
Thanks,
RS

Vista is Strict about drivers. Since Vista when RTM, I have had to replace
several CD/DVD, video cards even discs. If you look back at Vista, you will
find since the outset finding backwards compatible drivers has been the #1
problem..maybe that's why so any companies, individuals and gamers/system
builders refuse to "upgrade" from XP?

The sad truth, you will need to consign that video card to a backwards level
box or contact the mfg, see if they have proper Vista-ready driver for your
card. Vista has been a miracle for hardware mfg's. It has driven a lot of
sales and upgrades, even for newly purchased components, I had to toss a DVD
drive that is less than 6 months old. I contacted the manufacturer about a
newer or compatible driver - in essence they told me I was SOL, guess who
will never be on my short list when it comes to purchases in the future -
both the mfg and the company that unloaded that crap - I figure they both
knew it was not and would not be Vista capable.

ITtoolbox windows-vista-lYou took a leap of faith trying to use legacy hardware with Vista. Get the Vista SP 1 which is now available and contains expanded hardware support.
The file is a monster 445 MB in size so a fast link will be helpful.